Don't prevent calling from a debug prompt.

I think this commit is a step in the right direction, however it still requires something like this before calling the relevant methods:

    from zope.component.hooks import setSite
    setSite(plone)

    from sys import stdin, stdout
    from ZPublisher.HTTPRequest import HTTPRequest
    from ZPublisher.HTTPResponse import HTTPResponse
    from ZPublisher.BaseRequest import RequestContainer

    def hacked_makerequest(stdout=None, environ={}):
        resp = HTTPResponse(stdout=stdout)
        environ.setdefault('SERVER_NAME', 'foo')
        environ.setdefault('SERVER_PORT', '80')
        environ.setdefault('REQUEST_METHOD',  'GET')
        req = HTTPRequest(stdin, environ, resp)
        req._steps = ['noobject']  # Fake a published object.
        req['ACTUAL_URL'] = req.get('URL') # Zope 2.7.4
        from zope.publisher.browser import setDefaultSkin
        setDefaultSkin(req)
        requestcontainer = RequestContainer(REQUEST = req)
        return requestcontainer

    plone.REQUEST = hacked_makerequest()

And after calling them (e.g. `addPlominoRoleToUser`) it is necessary to `del plone.REQUEST` to avoid a traceback when trying to pickle `stdin`.